Other Waste Streams

Recovery of Soluble Silica

 

Soluble silica can be recovered from rice husks. Concentrations as high as 90% or more can only be recovered by being through a decomposition treatment that uses a titanium oxide catalyst, followed by separation from the catalyst with a sieve.

Before Treatment

Rice husks

After Treatment

Silica recovered
(Containing 90% or more of soluble silica)

Recovery of Carbon Fibers

 

The titanium oxide catalyst can decompose the resin component of carbon fibre-reinforced plastic (CFRP) to recover expensive carbon fliers without damaging the fibres.

 

Treatment of CFRP (semi-preg) in form of woven fabric

Before Treatment

Black carbon fibres and a white resin are woven together. The resin is also used in the spaces between the carbon fibres.

After Treatment

The resin component is completely decomposed, and the carbon fibres can be recovered in the form of woven fabric.

Treatment of CFRP (pre-preg) in form of sheet

Before Treatment

A product obtained by constructing unidirectional long carbon fibres into a sheet using a resin.

After Treatment

The resin component is completely decomposed, and the carbon fibres can be recovered in the form of long fibres.

Treatment of Shredder Residues

 

Shredder residue discharged from a recycling plant is treated. Various kinds of organic material contained in the residue are decomposed, and valuable metals such as iron, aluminium, and copper, are recovered.

Decomposition Treatment

Shredder Residue

Recovery of valuable metals

Copper/electrical wires, iron, aluminium, etc., and glass

Removal of Coatings on Metal Surfaces

 

An aluminium and steel products with a coating material or resin is treated. The coating material or resin is decomposed, and the aluminium or steel product is recovered in a state that contains only the valuable metals.

 

Coating removal treatment of aluminium product

Decomposition Treatment

Coating removal

The coating on the surface is completely removed.

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